Asphalt or bitumen substitute



' comma R PLASTIC 8 3 PM N... 15, 1921. 1,649,545

UNITED STATES PATENT OFFICE.

' ran-name: saoasa won, or caunmnn, ave-mama. assmnoa ro ausrmran arrumous cenoms nnrrran, or mnovaua, ans-mama, a coaronarrpu OI VICTORIA.

mnam'onnn'um I 1 M leihrawiag. Application nee leptenber 7, 1m, .lerlal Io. 818,110,141 Australia Kay 12, 1926.

, This invention relates to an improved coke, infusorial earth "m esite, limestone composition which is usable as a substitute Either urnt or un urn as s'os, cement, for asphalt or bitumen in the manufacture umice stone, firestone, e l metal E1- of damp courses for buildings, water-proof 32g, 050 ped ruBB'r, res 'duatoil Bitumen, 6 road coverings, paving materials and other ground ass, 1ca e o V composite materials, .and also as an electrisilicate q W t, cor, cal insulating material. BroEen stone-T" mi, auxlte an Tg' m illad asphalt and other natural ashagga, ,Uflie'r mg materials may also be halts are reco "d as being excellent bases V i 0 or the production of bituminous road cover The proportion of the fillingmaterial ings, but natural materials are very relative to the basic bituminous material costly and in recent years supplies have be- W111 vary according to the product required, come very diflicult to obtam; the particular fillinglmaterial or materials The present invention has been devised to used and the strengt or resiliency or other 15 provide a thetic bituminous material pfirties desired. In experiments I have capable of re no a compare ive y p need an excellent road coverin conlow cost and w 'c will have wearing prop taining of ground limestone (un m nt? erties equivalent to natural asphalts. and 20% of the basic 1 uminofis ma ena p The improved material consists basically Satisfactory resilient pavmg maiErmE Have I so of a mixture of oil-bea shale and tar. also been produced using shredded w ste 4 The oil shale may com o rbamfi, rub in approximately the same propor 7 tasmanite and tiomte (shales ob'timable 1011 o 80%. K in IR ralia) or 0 er shale, while the gr When used for road coverings, the matemay be of the v etable, mineral or animal may be heated to molten condition and 25 varie It is pre erred me oil affairs laid in situ similarly to Neuchat'el asphalt shoul be first pulverized in a suitable maand similar bituminous mafinals, or, alter- 75 "chine and subsequently incorporated with natlvely, it can be re-moulded into blocks heated tar. or slabs which may cemented in position.

T lie quantities of the two materials can For the reduction of electrical insulat- 30 vary but the proportion of one art ofvtar mg maten the basic bituminous material to one and' one half parts ofmm may be used either alone or in combination been found satisfactory. By mcreasmg the with limestone or other di-electric sub- Jmmatite, car um v m wam E2 relative roportion of tar in the mixture, a stances. Insulating slabs or blocks suitable Softer bituminous material having a relafor use in moun switches and electrical 35 tively low melting point is obtained. Bv mapparatus may be rmed by moulding the creasing the relative proportion of oil shale, in suitable apparatus, while in- 35 a hard and dense bituminous material havaulatmg tape and sheets may be manufac- .ing .a much higher melting point is protured fabrics in the molten duced. a bituminous material. The material obtained by mixing the two; What I do claim is:-

materials is used as a basis and is incor- 1. An asphalt or bitumen substitute, havrated with selected materials for the promg a base which consists exclusively of a notion of road coverings, damp courses for mixture of oil-bearing shale and tar. buildings and other comte materials. 2. An asphalt or bitumen substitute con- Q Satisfactory results have obtained by ststing of a filling material incorporated in mixing the basic bituminous material with. a basic material composed exclusively of oilq; one or-more of the followin 4 materials, bearing shale and tar.

viz, ironstone, In temmon whereof I aifix my signature. co FRED CK GEORGE RENOU. 

